The lens has been 39->49 step-up ring attached.
150g with the step-up ring as a filter thread
15/16? iris blades for almost circular opening
MFD = 0.54m
I bought this set $1,100 year 2000, the lens might cost ~$330,
because the lens is a bit cloudy and coating is partially missing.
This cam still works, the price of this lens is outrageous today.